Timing synchronizer



vApril-21, 1925. 1,534,161

H.B.COLESTOCK TIMING SYNCHRONIZER Filed March 9, 1921 Patented Apr. 21, 1925.

UNITED STATES HARRY B. COLESTOCK, OF PLYMOUTH, INDIANA.

TIMING SYNCHRONIZER.

Application filed March 9, 1921.

To all whom t may concern:

Be it known that I, HARRY B. Conns'rooK, a citizen of the United lStates, residing at Plymouth, in the county ot Marshall and State ot Indiana, have invented certain new and usetul Improvements in Timing Synchronizers, of which the following is a speciication.

My invention relates to improvements in timing s vnchrenizers, and it more especially comprises the features hereinafter pointed out in the annexed claims.

The purpose of my invention is to provide a synchroniser or timer for internal combustion engines of the Ford or other types that will withstand unprecedented wear; that is tree trom oxidation; that is self compensating, and which will not become deranged under the hardest usage.

Vith these and other ends in view, I illustrate in the accompanying drawing such instances of adaptation as will disclose the broad underlying features without limiting myselt' to the speciic details shown thereon and described herein.

lf'ig. 1 is an enlarged cross section of the entire device in assembled relation.

Fig. 2 is a perspective view of a contact unit.

Fig. 3 unit.

Fig. Liis a diagrammatic frontelevation showingl the contact rollers in relation to one oi the contact units.

In devices ot this general character made heretofore, it has been the practice to place one er more rollers under extraneous spring pressure so as to cause them to make clectric contact at their periphery on one side ot their center ot' rotation, without controlling` the position ot that portion of the roller circumference lying diametrically opposite their point of contact. In my imf provement I remedy this defect and thereby secure a more permanent structure. I also attain greater adaptability of the rolliiigwiping contacts by reason of the fact that bot-h rollers of a pair react on each other through a single spring interposed between them.

When rolling contacts are used in pairs with a separate spring for each roller, there can be no reaction from one roller to the other; consequently there will not be any equalization of wear on the stationary contact units. In my improvement, it is not is a front elevation of a Contact Serial No. 450,939.

necessary that the stationary contacts occurring on the same plane be aligned with great precision, or that the companion contact of each pair of contacts be spaced apart with extreme accuracy'. The reason for this lack of precision is found in the self-compensating feature ot my device; wherein the eXtra shift of the roller instantlyY reacts on its companion through the single spring which is placed between them.

In carrying out the features of my invention, I may use any alternatives which the various exegencies of practice and adaptation may require without departing from the spirit of my invention. The exemplication instanced in the drawing comprises a supporting casing 1, through which a timer shaft 2, passes. This casing has a recess 12, in which the rockable casing 3., is seated; and wherein it can be moved by means of any kind of link or connection (not shown) attached to the projecting lug The casing 3, is detachably held in the recess 12, in any suitable well known manner (not shown).

On the end of the timer shaft 2, a hub 16, is secured by a pin 17, that rests in a slot of the hub; or the hub may be secured so as to rotate with the shaft 2, in any other desired manner. The hub may have free endwise movement, within limits, it desired, but these details are largely modifiable to suit varying requirements of design, etc. The hub 16, has two radial arms 18, which form a slot 24, between them. At the inner portion or" this slot the side falls are beveled at 2l, so as to control the position ot the contact rollers, disks or wheels, 22, and prevent unnecessary spreading ot' the rollers at their peripheries nearest the shaft, 2, and also thereby prevent needless wear on themselves and the supporting pins 19. A single spring 20, is placed on each ot these pins between the rollers 22, so as to uninterrnptedly act on both rollers at all times.

The timer casing 3, has a flange 4, that is seated in the recess 12 of casing 1. This flange terminates in a shoulder 5, against which the formed insulating angle piece 15, abuts. This serves to prevent the contacts 14, shitting about the center of the attaching screws 8, thereby maintaining the several contacts in working alignment. The contacts 14, are curved away from each other as shown in Fig. 1; and at the same time they are curved away from the plane Il i) of rotation of the rollers or disks 22, as the)v travel with the hub 16. This is espe` cially shown in Figures 1,'3 and 4. 'The contacts 14, occur in pairs, being joined by a sul'iporting head 13, through which a screw S, passes. The heads 9, of these screws are flattened to pass between the sides 14, as shown in Fig. 3.

rlhere are as many Contact or tracks units in a casino 3, as there are cylinders to be served, being practically duplicates ot each other. The screws 8,`pass through insulating bushings 6. These bushings co-operate with insulating washers Y, andy the'forined insulatingnngles "i5, to completely insulate the` contact units Vlrom the casing 3. Lock-y ing` nuts 1G, are threaded onto 'screws S,`t'o clamp the contact unitsonto the flange Ll, otthe casing 3; and binding nuts 11, are placed outside oi nuts 10, to holdv the ends of the Wires n'liiclrlead to the respective cylinders (not shown).

It is a demonstrated fact that when cointact-s are plaoedin parallel, they have less resistance than when used singly. It Vis also known that wiping or sliding contacts are soonv Worn out; and equally Well known that end to end contacts sooneror later oxidize and cause trouble; lint with mutually interacting iollalole contacts as herein disclosed, When grouped in pairs, the usual disadvai'itages disappear. i

Yhile rollers have been referred to in the description it is to be understood that my rollable contacts are really" disks, which make a side Contact that does'a'way with undue heat-ing on account ot the large suraccsv-fhich engage each other. The ordinary 'lorm of rollercontact only makes engagement over an estreniely vsmall sui-tace area, being in a sense alin t a knife cdgre\v liich soon` deteriorates ivhcn the usual current .strengths arc dealt with. l

v flined surfaces 2l, on account ol thcdiks rubbing against them 'servos lo automatically knop their contact 'faces rlcan and in the bc:` electrical condition.

.\n additional (feature, which. ra'ssisls in reducing the spari is thc formation oi.l a miniature horse-shoe magnet comprised in the projections lkand heads 13. These may lie made with a sott inner core. The magneti/ing ellect is due to the passing` current. The residual rinnant in the outer portion of projections assists in producing' a mag"- netic lilou-out etl'cct which also vtends to reduce sparkingI when the circuit is broken at thecontacts.

That l claim is 1'. In timing' mechanisms, a plurality ot stationary duplex tracks, pair ot 5rollab'le disksfnieans for successively moving said disks past the tracks and in engagement therewith, a common support for the ydisks on which they have free movement, and elasticmeans' placed bettveent'hem' to" press theI ldisks olitivardly independent of cach other.

2. In timing' mechanisms, a plurality of duplex tracks arranged in a group, a suitable' casing'therefor, means tor shitting` the casing so as to move all the tracks simultaneously; a'pair' of yieldable rolling,iv disks adapted to successively the tracks` means for yieldingly pressing' the disks away from' eachV othcr, "means for lin'iiting' the spreadingapart of the disks, and means con'iprising the aforesaid tracks for moving the disks'towa'rd each other during the time they are n'iakinir Contact with any' one of the tracks. t i

Si. ln timing synchroni'fairs, a pair of reliable coiitactfmakinn' members, a pin coinmoirto'bo'thga spring'acting on the adjacent .facesio'fiboth members simultaneously While supported by the pin."

'timing synchronizers, a rotating arm, 'a pair of rollable coiitacts, interdel pendent on a. single tension member as to sidew'ise position with respect lo' cach other: but independent of cath other as to their reliability, and means 'on said arm limiting' the extent othe'action ofl lhe'aforesaiiil spring. '1

5l In timing synclironizers, a pair of rollable contacts having relatively fiat faces adjacent each other and curved outer laces, and a tension device common to both contacts.

"6.' ln timing mechanisms, a. duplex curved diverging faced'track, a contactingr member comprising-a pair ot rollable disks,"a supporting;l pin for said disks, a holder fortlie piriient'erial ofthe disks,yieldingv means lietiveen the disks adapted Vto cause said disks to nove *away 'lroin'leach other, and means for rotating -thel'islr' ln'ilder so as to sncccssively bring' the. (lf lis between the duplex tracks antlu'liilc in such position the flircrrA ing' l"`ace's'ol"'the traf-k will 'press thi;- disks touarllcach-other. 'I

7,111 tilnin'n `nierlimiisnis, a pair oil rollable (lisls;"yi ling'nwzuis Ytor moving4 the disks vavv'ay lioin"'eaclr"other, means lor periodically positively moving; the disks toward each other tlirougg'hftheir engag'cn'rent with a suitable duplex trackor contact.

"8. In" timingmechanisms,"' a `U-shaped member constituting' `a` :duplex track, r'ollable disks engaging' the' adjacent vfaces of sait track to make electric 'Contact thereW-itl'` said" U-'shaped member being inagnetizel and therhy'assistsektingnishing` an'elel'- tric spark that may he formed ivhen the disks and track are separated 'from each other. y ,.,V t. ,l

" In testimony whereof. l atlix my signature.

" HRRYB. GOLESTOUK. 

